Bod gurgled happily, sounding much like they were
saying:

If none of the other responses works, try CPU-Z.
http://www.cpuid.com/softwares/cpu-z.html

Use this first! It's excellent. It's now in my set of software that I
install as standard.

I agree, it is very good.

I can honestly say I've never had a need for any of that information -
or even cared particularly about the clock speed. Either the machine's
quick enough, or it isn't. If it isn't, it's rarely the CPU speed which
is the biggest bottleneck.

So what am I missing?

The information.

Well, yes, but is it information, or just data? Why should I care?